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max_align_t

From cppreference.com
< c‎ | types
Defined in header <stddef.h>
typedef /*implementation-defined*/ max_align_t;
(since C11)

max_align_t is a type whose alignment requirement is at least as strict (as large) as that of every scalar type.

[edit] Notes

Pointers returned by allocation functions such as malloc are suitably aligned for any object, which means they are aligned at least as strict as max_align_t.

max_align_t is usually synonymous with the largest scalar type, which is long double on most platforms, and its alignment requirement is either 8 or 16.

[edit] See also

C++ documentation for max_align_t